Choose ONE BEST answer for each question. (1.5 mark per each)

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1. ALL of the following are aggregate tests EXCEPT:

a) Viscosity

b) LA abrasion

c) Soundness

d) Sieve analysis

2. Asphalt Concrete can be composed of the following EXCEPT:

a) Air

b) Water

c) Aggregate

d) Asphalt

3. If MC is greater than AC, the aggregate is:

a) Wet in the stockpile

b) In an oven dry state

c) Dry in the stockpile

d) Will absorb mixing water in a asphalt concrete mix

4. ALL of the following are laboratory tests for asphalt binder characterization EXCEPT:

a) Brookfield Rotational Viscometer (RV)

b) Dynamic Shear Rheometer (DSR)

c) Indirect Tension test (IDT)

d) Bending Beam Rheometer (BBR)

5. In general, Gse is       Gsb.

a) Larger than

b) Smaller than

c) the same as

d) 4 times as small as

6. Which of the following binder grade should be selected at a 98% reliability level where the mean seven-day maximum pavement temperature is 58°C with a standard deviation of 1.5°C AND a mean minimum pavement temperature of -18°C with a standard deviation of 2.0°C?:

a) PG 58-16

b) PG 58-22

c) PG 64-16

d) PG 64-22

7. ALL of the following are maximum specifications in the PG binder specification

EXCEPT:

a) Resistance to thermal cracking in terms of stiffness

b) Resistance to rutting

c) Resistance to fatigue cracking

d) Pumpability / handling

8. An asphalt concrete mixture test used to estimate resistance to rutting is:

a) Flexural Bending Beam

b) Dynamic Shear Rheometer (DSR)

c) Thermal Stress Restrained Specimen Test (TSRST)

d) Asphalt Pavement Analyzer (APA)

9. In the PG binder specification, the property that controls mixture resistance to thermal cracking is:

a) G*/sin d

b) S(t=60)

c) G* sin d

d) E*

10. The concept of time-temperature superposition is used to characterize asphalt concrete in terms of a master curve for the following parameter:

a) Stiffness

b) Stability

c) Safety

d) Solubility

11. The mechanism of material failure caused by repeated loads is:

a) Creep

b) Fracture

c) Fatigue

d) Relaxation

12. High binder contents provide ALL of the following benefit to asphalt concrete mixtures

EXCEPT:

a) Durability

b) Stability

c) Resistance to fatigue cracking

d) Resistance to thermal cracking

13. Short-term aging that occurs during production and placement of asphalt concrete is simulated by the following:

a) Pressure Aging Vessel (PAV)

b) Long-Term Oven Aging

c) Dynamic Shear Rheometer (DSR)

d) Rolling Thin Film Oven Test (RTFO)

14. If you achieved a degree of compaction of 98% and your bulk specific gravity is 2.67, you targeted a maximum theoretical specific gravity (Gmm) of:

a) 2.71

b) 2.72

c) 2.75

d) 2.80

15. If you need to make a specimen 10.16 cm in diameter and 7.62 cm high, and the target bulk specific gravity is 2.68, then the mass of the material used should be close to:

a) <1,400g b) 1,550g c) 1,650g d) >1,700g

16. Which of the following is NOT considered an aggregate property in asphalt concrete volumetric calculations?

a) VMA

b) Gsb

c) Gmm

d) Gse

17. In the aggregate, the effective volume (Vse) is generally      the bulk volume (Vsb).

a) Larger than

b) The same as

c) Smaller than

d) 4 times as small as

e) None of the above

18. The type of aging that occurs during mixing and compaction in the field is referred to as:

a) Medium-term aging

b) Long-term aging

c) Short-term aging

d) None of the above

19. The mixing and compaction temperatures of asphalt mixes are determined based on:

a) Aggregate gradation

b) Aggregate type

c) Asphalt binder viscosity

d) % air void

20. Select a correct match for the performances of asphalt concrete and test methods shown in the figure below:

a) (B) Rutting; (C) Fatigue; (D) Thermal cracking

b) (B) Fatigue; (C) Rutting; (D) Thermal cracking

c) (B) Fatigue; (C) Thermal cracking; (D) Rutting

d) (B) Thermal cracking; (C) Fatigue; (D) Rutting

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